Ended up getting this crash twice in a row while building a windmill setup. Previously never saw crashes while doing this.

https://pastebin.com/MSCai3dm

Hi, thanks for reporting it to us.
Could it be that you were having some network latency between you and the server you were playing on?

None that isn't normal; I hover around 25-30ms latency. I think it may have had something to do with how fast I was breaking the block, because when I turned off my Haste II, it didn't happen anymore.

This should be addressed in the new version that went live just now.
Thanks for the Issue and feel free to re-open if need be.